Need Help! Let's build some ISO20 spindles


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Thread: Let's build some ISO20 spindles

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    Member Azalin's Avatar
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    Default Let's build some ISO20 spindles

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    It took some time to finish the first gripper because I was busy with other things but here it is. Jaws made from ck45.

    Sent from my MI 5s Plus using Tapatalk

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    And here I am on the design at the moment.

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-1-jpg  
    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    What is the correct angle for ISO20 taper? I mean what the angle of the spindle taper should be?

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    um. shoudlnt that have been the first step here?



    taper for ALL steep taper type tooling, regardless of size is 7 in 24.

    which means, your profile reference points for angle are are 3.5 units radially, 24 units axial. with an opening of 22.225mm (7/8") diametre.



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    Default Re: Let's build some ISO20 spindles

    Soo, does that make 16,5943?

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    i hope not. your tools will fall out.

    it should be half that per side.

    i assume you need the actual angle for manual lathe?



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    Default Re: Let's build some ISO20 spindles

    Hi again,

    It's a CNC'ed lathe.

    According to my calculation the angle of the line is 188.29715° however, I just tried to cut the taper on aluminium but it is narrower on the large size so there is a little play on the small side. What did I miss?

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-crv-jpg  
    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Member Mecanix's Avatar
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    Default Re: Let's build some ISO20 spindles

    AL is not cheap :/ Can we see your sketch's dim or part's pmi?

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-tapperangle-jpg  


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    Default Re: Let's build some ISO20 spindles

    al is cheap AF :P
    better to screw that up than A2

    this is also why you dont use angles. use the 7 in 24 measurements.

    difficult to know what has gone wrong, without knowing you use 7 in 24 to start (and not some rounded off angle)



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    Default Re: Let's build some ISO20 spindles

    Quote Originally Posted by ihavenofish View Post
    al is cheap AF :P
    better to screw that up than A2
    haha true. To clarify my comment I would have done that rough fitting test with a cheap'er composite, wax or hell.. an old piece of wood maybe
    ps. please never tell my wife where are her ikea candles, she'll destroy me. She still wonders where they are



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    Default Re: Let's build some ISO20 spindles

    you must work at one of the spindle factories ive talked to.....



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    Default Re: Let's build some ISO20 spindles

    ah. Nah at our spindle factory we use A4 size sheet of paper rolled between our fingers to dbl-check tapper angles. The sign-off engineers prefer that entertainment over having to click those 4 buttons out of that Microsoft Scientific calculator.



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    Default Re: Let's build some ISO20 spindles

    Hi,

    atan(7/24) makes 16.2602047083 degrees so half of the angle is 8.13010235416. So my angle will be 188.13010235416

    I hope I'm good this time. Can you please confirm?

    By the way, I don't know if I could directly enter "arctan(7/24)" to the angle text field in SolidWorks. I'll give it a try.

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-arctan1-png  
    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    Getting the same at my end, measured from centerline mind you. Both 3.5/12 & 7/24 checks out...
    If your CAD can't do math and arithmetic/operators it is not a CAD, its a scam
    Bet SW can do formulas better than most others anyway... you should be more than okay on that side

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-tangle-jpg  


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    Default Re: Let's build some ISO20 spindles

    Thanks

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    Hi again,

    7/24 doesn't fit. There is still space in the small end of the taper. However I tried 8° 17' 50" and it appears to be the correct angle.

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-bt30taper-jpg  
    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default Re: Let's build some ISO20 spindles

    O_o
    whats that in decimal?

    curious why it wouldn't match up. I was certain all those tapers were the same spec.



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    Default Re: Let's build some ISO20 spindles

    Quote Originally Posted by ihavenofish View Post
    whats that in decimal?.
    8.2972°



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    Default Re: Let's build some ISO20 spindles

    thats 7 in 24.....

    why cant kids math these days?

    Attached Thumbnails Attached Thumbnails Let's build some ISO20 spindles-taper-jpg  


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